<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 18:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.02.15 (046) 18:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202604602151840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.626" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.991" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="205.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="205.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.895" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="358.701" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="274.942" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.589" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="111.710" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.034" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.113" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="145.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.170" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="166">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
205.000 205.000 206.667 208.333 210.000 211.667 213.333 215.000 218.333 221.667 225.000 228.333 231.667 235.000 240.000 245.000 248.333 251.667 255.000 255.000 258.125 261.250 264.375 267.500 270.625 273.750 276.875 280.000 283.125 286.250 289.375 292.500 295.625 298.750 301.875 305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 325.000 325.000 326.250 327.500 328.750 330.000 331.250 332.500 333.750 335.000 340.000 340.000 340.000 345.000 346.000 347.000 348.000 349.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 365.000 366.667 368.333 370.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 402.500 405.000 405.000 405.000 405.000 406.667 408.333 410.000 410.000 415.000 420.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 436.667 438.333 440.000 442.500 445.000 450.000 451.667 453.333 455.000 455.000 455.000 455.000 460.000 465.000 465.000 468.750 472.500 476.250 480.000 475.000 485.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 534.066 544.726 557.440
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 0 0 0 51 0 48 0 0 0 54 57 57 0 0 54 45 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 54 0 0 57 54 60 0 63 63 63 66 66 69 66 63 48 66 63 0 57 51 45 0 0 63 0 0 0 57 66 63 60 63 0 0 0 45 66 66 60 0 66 63 60 63 54 0 0 51 57 63 69 57 63 66 63 63 63 57 63 63 66 60 63 63 66 63 48 63 63 0 54 63 66 66 0 0 63 60 0 45 63 63 57 0 63 63 57 57 0 57 60 60 57 54 57 57 0 0 57 0 57 48 0 0 45 51 54 0 0 48 51 0 0 0 48 0 48 45 48 48 0 48 48 45 45 45 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 1.953125 -1.953125 -1.171875 1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 1.953125 2.734375 -0.390625 0.390625 -1.953125 -2.734375 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 2.734375 2.734375 0.390625 0.390625 -0.390625 -0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 2.734375 -0.390625 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.564 90.0 95.0 100.0 105.0 110.0 113.694 115.0 117.388 120.0 121.082 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 358.701 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.946 2.506 2.801 2.895 2.773 2.773 2.773 2.859 2.895 3.0 3.133 3.267 3.403 3.54 3.68 3.822 3.968 4.118 4.271 4.428 4.589 4.754 4.924 5.097 5.274 5.456 5.641 5.83 6.022 6.219 6.418 6.621 6.827 7.036 7.248 7.463 7.68 7.9 8.122 8.346 8.574 8.803 9.034 9.268 9.503 9.741 9.979 10.218 10.457 10.694 10.927 11.151 11.36 11.545 11.69 11.779 11.8 11.799 11.788 11.762 11.723 11.67 11.606 11.531 11.445 11.349 11.245 11.133 11.013 10.887 10.754 10.616 10.473 10.326 10.175 10.021 9.864 9.705 9.544 9.382 9.218 9.054 8.889 8.725 8.56 8.396 8.232 8.069 7.907 7.746 7.587 7.429 7.273 7.119 6.966 6.816 6.667 6.52 6.376 6.234 6.094 5.957 5.821 5.688 5.558 5.429 5.304 5.18 5.059 4.94 4.824 4.71 4.598 4.489 4.381 4.276 4.174 4.073 3.975 3.879 3.785 3.693 3.603 3.515 3.429 3.346 3.264 3.183 3.105 3.029 2.954 2.881 2.81 2.741 2.673 2.607 2.542 2.479 2.417 2.357 2.299 2.241 2.185 2.131 2.078 2.026 1.975 1.926 1.878 1.831 1.785 1.74 1.697 1.654 1.613 1.572 1.533 1.494 1.457 1.42 1.385 1.35 1.316 1.283 1.251 1.219 1.189 1.159 1.13 1.101 1.073 1.046 1.02 0.994 0.969 0.945 0.921 0.898 0.875 0.853 0.832 0.811 0.79 0.77 0.751 0.732

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.895" PeakHeight="110.0" Num="3" Error="0.0">
-30.105 12.571 -2.902
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.895" EndFrequency="11.8" PeakHeight="358.701" Num="5" zHalfNm="274.942" Error="4.674">
-188.011 -62.643 15.863 -4.031 1.203
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.082" Depth="0.122"/>
<TopsideChapman PeakHeight="358.701" PeakDensity="1727543.4" PeakScaleHeight="61.113" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
